Cyclopolymerization of 4,4-Bis[(trifluoroacetoxy)methyl]-1,6-heptadiyne by Transition Metal Cartalysts
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Conjugated polymers featuring a delocalized electronic structure have been developed into a class of promising materials for light-emitting diodes, electrochromic devices, p-electron polarization for nonlinear optics, charge transport for organic electronics, and chemo- and bio-sensors. Here, A new polyacetylene derivative was synthesized by the ring-forming polymerization of 4,4-bis[(trifluoroacetoxy) methyl]-1,6-heptadiyne using transition metal catalysts. The avctivity of Mo-based catalysts was found to be more higher than that of W-based catalysts. The resulting conjugated polymer was mostly insoluble in organic solvents because of the cross-linking reaction of polymer itself during the polymerization process. The IR spectrum of polymer did not show the acetylenic C≡C and ≡C-H stretching frequencies. And the resulting polymers were found to be mostly amorphorus.